section.two-buttons {
  font-size: 1.25em;
}

section.two-buttons .button {
  display: block;
  margin: 2rem;
}

@media screen and (min-width: 30rem) {
  section.two-buttons {
    width: 100%;
    max-width: 40rem;
    display: table;
    table-layout: fixed;
    border-spacing: 2rem 0;
    margin: 3rem auto;
  }

  section.two-buttons .button {
    display: table-cell;
    width: 50%;
    margin: 0;
  }
}